-extern const char *hook_constcharptr_tree_null (tree);
-extern const char *hook_constcharptr_rtx_null (rtx);
-extern const char *hook_constcharptr_tree_tree_null (tree, tree);
-extern const char *hook_constcharptr_int_tree_null (int, tree);
-extern const char *hook_constcharptr_int_tree_tree_null (int, tree, tree);
+extern const char *hook_constcharptr_const_tree_null (const_tree);
+extern const char *hook_constcharptr_const_rtx_null (const_rtx);
+extern const char *hook_constcharptr_const_tree_const_tree_null (const_tree, const_tree);
+extern const char *hook_constcharptr_int_const_tree_null (int, const_tree);
+extern const char *hook_constcharptr_int_const_tree_const_tree_null (int, const_tree, const_tree);